Hi, I thought I would post this in case anyone else has this problem. I'm running this on a Thinkpad T61 with the integrated Intel graphics (GMA965). It could be that the low specs are causing the problem?
Afer downloading Cogs, I played it for the first time and changed some of the game settngs to higher values from their defaults. The game played ok (choppy sound), but when I tried to restart the game later, I got nothing. In the terminal where I started Steam, there were lots of warning messages but I think the relevant one might be
Couldn't set 1440x900 OpenGL video mode: Couldn't find matching GLX visual
Game removed: AppID 26500 "Cogs", ProcID 6317
Anyway, I was able to start Cogs by editing ~/.local/share/Cogs/cogs.ini to return the game settings to their minimum values, which look like this: